Court case
In re OpenAI Copyright Infringement Litigation
In re OpenAI, Inc. Copyright Infringement Litigation is the consolidated set of US copyright lawsuits against OpenAI and Microsoft, including the New York Times case and claims by book authors. It is pending before Judge Sidney Stein in the Southern District of New York as MDL No. 3143 and centres on whether training large language models is fair use.
Last reviewed 28 Oct 2026
Facts at a glance
| Court | US District Court for the Southern District of New York |
|---|---|
| Docket | 1:25-md-03143 (SHS) (OTW) source |
| Defendants | OpenAI and Microsoft, among others |
| Plaintiffs | News publishers including The New York Times, plus book authors and publishers |
| US statement of interest | Filed 1 September 2026, arguing that LLM training is fair use source |
| Status | Pending; fair use not yet decided |
Questions people ask
- Who is suing OpenAI in this litigation?
- The consolidated cases include The New York Times and other news publishers as well as book authors and publishers. The US government's September 2026 filing says its arguments apply to all of them.
- Has the court ruled on fair use?
- Not as of 28 October 2026. The question is pending before Judge Sidney Stein in the Southern District of New York.